A pre-qualification is normally issued by a loan officer, who, after interviewing you, determines the dollar value of a loan you can be approved for. However, loan officers do not make the final approval, so a pre-qualification is not a commitment to lend. After the loan officer determines that you pre-qualify, he/she then issues you a pre-qualification letter. This pre-qualification letter is used when you are making an offer on a property. The pre-qualification letter indicates to the seller that you are qualified to purchase the house you are making an offer on.